Deaf Bonce Apocalypse AP-M81SE 8-inch Midrange Speakers User Manual

1. Introduction

This manual provides essential information for the proper installation, operation, and maintenance of your Deaf Bonce Apocalypse AP-M81SE 8-inch Midrange Speakers. These speakers are designed to deliver high output and clear sound, suitable for various audio systems. Please read this manual thoroughly before installation and use to ensure optimal performance and longevity of your product.

Figure 1: Front view of the Deaf Bonce Apocalypse AP-M81SE 8-inch Midrange Speaker.

2. What's in the Box

Carefully unpack the contents and ensure all items are present:

• 2 x Deaf Bonce Apocalypse AP-M81SE 8-inch Midrange Speakers
• 1 x 4 Channel Class D Amplifier AAP-400.4D (if included in your package)
• User Manual (this document)

Figure 2: A pair of Deaf Bonce Apocalypse AP-M81SE 8-inch Midrange Speakers.

3. Setup and Installation

Proper installation is crucial for optimal performance and safety. If you are unsure about any steps, it is recommended to seek professional installation.

3.1 Safety Precautions

• Disconnect the vehicle's battery before starting any electrical work.
• Wear appropriate safety gear, including eye protection.
• Ensure all wiring is properly insulated and secured to prevent short circuits and damage.
• Do not exceed the speaker's rated power handling (170W RMS, 340W MAX).

3.2 Mounting the Speakers

1. Choose a Location: Select a suitable mounting location in your vehicle that can accommodate the speaker's dimensions (Mounting depth: 3.44" (87.5 mm), Cut-out dimension: 7.32" (186.0 mm)).
2. Prepare the Mounting Surface: Ensure the surface is flat and sturdy. If cutting a new opening, use appropriate tools and follow safety guidelines.
3. Secure the Speaker: Place the speaker into the opening and secure it using appropriate screws or mounting hardware (not included unless specified). Ensure a tight fit to prevent vibrations.

3.3 Wiring Connections

The AP-M81SE speakers have an impedance of 4 Ohms. Ensure your amplifier is stable at this impedance. Connect the positive (+) terminal of the speaker to the positive (+) output of your amplifier, and the negative (-) terminal of the speaker to the negative (-) output of your amplifier.

Figure 3: Rear view of the speaker, illustrating the connection terminals.

1. Identify Terminals: Locate the positive (+) and negative (-) terminals on the back of the speaker.
2. Connect Speaker Wires: Use high-quality speaker wire. Strip a small amount of insulation from the ends of the wires. Connect the positive wire from the amplifier to the speaker's positive terminal and the negative wire from the amplifier to the speaker's negative terminal. Ensure connections are secure and free from stray strands that could cause a short circuit.
3. Connect to Amplifier: Follow your amplifier's manual for proper connection to its output terminals.

4. Operating Instructions

Once installed, follow these steps for initial operation:

1. Initial Power On: After all connections are made and checked, reconnect the vehicle's battery. Turn on your audio source (head unit) and then your amplifier.
2. Volume Control: Start with the volume at its lowest setting. Gradually increase the volume to a comfortable listening level.
3. Amplifier Gain Setting: Adjust the gain control on your amplifier carefully. The gain control is not a volume knob; it matches the output voltage of your head unit to the input sensitivity of your amplifier. Incorrect gain settings can lead to distortion and speaker damage. Consult your amplifier's manual for proper gain setting procedures.
4. Crossover Settings: For optimal performance and protection, use a high-pass filter (HPF) on your amplifier or head unit. A recommended starting point for these midrange speakers is an HPF set around 110-150 Hz with a 12dB/octave slope. Adjust as needed for your specific system and listening preferences.

5. Maintenance

Regular maintenance helps ensure the longevity and performance of your speakers.

• Cleaning: Use a soft, dry cloth to gently wipe dust from the speaker cones and frames. Avoid using harsh chemicals or abrasive cleaners.
• Moisture: Keep speakers dry. Exposure to excessive moisture can damage the cone material and internal components. These speakers are not water-resistant.
• Inspection: Periodically check speaker connections for tightness and signs of corrosion. Ensure mounting screws are secure.
• Avoid Overpowering: Continuously playing music at extremely high volumes or with excessive distortion can damage the speakers. Listen for signs of distortion and reduce volume if heard.

6. Troubleshooting

If you encounter issues with your speakers, refer to the following common problems and solutions:

6.1 No Sound from Speakers

• Check Power: Ensure your amplifier is powered on and receiving power.
• Verify Connections: Double-check all speaker wire connections at both the speaker and amplifier terminals. Ensure no wires are loose or shorting.
• Audio Source: Confirm your head unit or audio source is functioning correctly and outputting sound.
• Amplifier Settings: Check amplifier gain, crossover, and input settings. Ensure the amplifier is not in protection mode.

6.2 Distorted or Unclear Sound

• Gain Setting: The amplifier gain may be set too high, causing clipping. Reduce the gain until distortion disappears.
• Crossover Settings: Incorrect crossover settings can cause distortion. Adjust the HPF to prevent the speakers from playing frequencies too low for their design.
• Overpowering: Reduce the volume. If distortion persists at lower volumes, the speaker may be damaged or the amplifier may be underpowered/overpowered for the speaker.
• Loose Connections: Check for any loose wiring or mounting that could cause rattling or buzzing.

6.3 Low Volume

• Gain Setting: The amplifier gain may be set too low. Increase the gain gradually.
• Head Unit Volume: Ensure the volume on your head unit is turned up.
• Wiring: Verify correct wiring polarity (+ to + and - to -). Incorrect polarity can cause phase issues and reduced output.

7. Specifications

8. Warranty Information

These Deaf Bonce Apocalypse AP-M81SE speakers come with a Limited Manufacturer Warranty. The specific terms and duration of the warranty may vary. Please retain your proof of purchase for warranty claims. For detailed information regarding warranty coverage, terms, and conditions, please refer to the documentation provided with your purchase or contact Deaf Bonce customer support directly.

9. Support

For technical assistance, installation questions, or warranty inquiries, please contact Deaf Bonce customer support. It is recommended to have your product model number (AP-M81SE) and proof of purchase ready when contacting support.

If you are experiencing complex installation issues, consider consulting a certified car audio professional.